mirror of https://github.com/knative/func.git
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
// Copyright 2018 Netflix, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package expect
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import (
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"bufio"
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"io"
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"strings"
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"testing"
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)
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// NewTestConsole returns a new Console that multiplexes the application's
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// stdout to go's testing logger. Primarily so that outputs from parallel tests
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// using t.Parallel() is not interleaved.
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func NewTestConsole(t *testing.T, opts ...ConsoleOpt) (*Console, error) {
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tf, err := NewTestWriter(t)
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if err != nil {
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return nil, err
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}
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return NewConsole(append(opts, WithStdout(tf))...)
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}
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// NewTestWriter returns an io.Writer where bytes written to the file are
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// logged by go's testing logger. Bytes are flushed to the logger on line end.
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func NewTestWriter(t *testing.T) (io.Writer, error) {
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r, w := io.Pipe()
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tw := testWriter{t}
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go func() {
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defer r.Close()
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br := bufio.NewReader(r)
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for {
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line, _, err := br.ReadLine()
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if err != nil {
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return
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}
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_, err = tw.Write(line)
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if err != nil {
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return
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}
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}
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}()
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return w, nil
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}
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// testWriter provides a io.Writer interface to go's testing logger.
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type testWriter struct {
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t *testing.T
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}
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func (tw testWriter) Write(p []byte) (n int, err error) {
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tw.t.Log(string(p))
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return len(p), nil
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}
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// StripTrailingEmptyLines returns a copy of s stripped of trailing lines that
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// consist of only space characters.
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func StripTrailingEmptyLines(out string) string {
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lines := strings.Split(out, "\n")
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if len(lines) < 2 {
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return out
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}
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for i := len(lines) - 1; i >= 0; i-- {
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stripped := strings.Replace(lines[i], " ", "", -1)
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if len(stripped) == 0 {
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lines = lines[:len(lines)-1]
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} else {
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break
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}
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}
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return strings.Join(lines, "\n")
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}
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